Update bench pictures to time image decode & upload costs

tools/PictureRenderer.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef PictureRenderer_DEFINED
 #define PictureRenderer_DEFINED
 
@@ skipping 130 matching lines @@
     virtual TiledPictureRenderer* getTiledRenderer() { return NULL; }
 
     /**
      * Resets the GPU's state. Does nothing if the backing is raster. For a GPU renderer, calls
      * flush, and calls finish if callFinish is true.
      * @param callFinish Whether to call finish.
      */
     void resetState(bool callFinish);
 
     /**
+     * Remove all decoded textures from the CPU caches and all uploaded textures
+     * from the GPU.
+     */
+    void purgeTextures();
+
+    /**
      * Set the backend type. Returns true on success and false on failure.
      */
     bool setDeviceType(SkDeviceTypes deviceType) {
         fDeviceType = deviceType;
 #if SK_SUPPORT_GPU
         // In case this function is called more than once
         SkSafeUnref(fGrContext);
         fGrContext = NULL;
         // Set to Native so it will have an initial value.
         GrContextFactory::GLContextType glContextType = GrContextFactory::kNative_GLContextType;
@@ skipping 416 matching lines @@
 
     typedef PictureRenderer INHERITED;
 };
 
 extern PictureRenderer* CreateGatherPixelRefsRenderer();
 extern PictureRenderer* CreatePictureCloneRenderer();
 
 }
 
 #endif  // PictureRenderer_DEFINED